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Make lf stack push return if the stack was empty
[urcu.git]
/
urcu
/
compiler.h
diff --git
a/urcu/compiler.h
b/urcu/compiler.h
index ca32debce01d47a49614bd281ab495355949f4aa..f8fce5a6b46558fa4a4b2d50f78f91eecf229c90 100644
(file)
--- a/
urcu/compiler.h
+++ b/
urcu/compiler.h
@@
-28,23
+28,23
@@
/*
* Instruct the compiler to perform only a single access to a variable
* (prohibits merging and refetching). The compiler is also forbidden to reorder
/*
* Instruct the compiler to perform only a single access to a variable
* (prohibits merging and refetching). The compiler is also forbidden to reorder
- * successive instances of C
AA
_ACCESS_ONCE(), but only when the compiler is aware of
+ * successive instances of C
MM
_ACCESS_ONCE(), but only when the compiler is aware of
* particular ordering. Compiler ordering can be ensured, for example, by
* particular ordering. Compiler ordering can be ensured, for example, by
- * putting two C
AA
_ACCESS_ONCE() in separate C statements.
+ * putting two C
MM
_ACCESS_ONCE() in separate C statements.
*
* This macro does absolutely -nothing- to prevent the CPU from reordering,
* merging, or refetching absolutely anything at any time. Its main intended
* use is to mediate communication between process-level code and irq/NMI
* handlers, all running on the same CPU.
*/
*
* This macro does absolutely -nothing- to prevent the CPU from reordering,
* merging, or refetching absolutely anything at any time. Its main intended
* use is to mediate communication between process-level code and irq/NMI
* handlers, all running on the same CPU.
*/
-#define C
AA
_ACCESS_ONCE(x) (*(volatile typeof(x) *)&(x))
+#define C
MM
_ACCESS_ONCE(x) (*(volatile typeof(x) *)&(x))
-#ifndef max
-#define max(a,b) ((a)>(b)?(a):(b))
+#ifndef
caa_
max
+#define
caa_
max(a,b) ((a)>(b)?(a):(b))
#endif
#endif
-#ifndef min
-#define min(a,b) ((a)<(b)?(a):(b))
+#ifndef
caa_
min
+#define
caa_
min(a,b) ((a)<(b)?(a):(b))
#endif
#if defined(__SIZEOF_LONG__)
#endif
#if defined(__SIZEOF_LONG__)
@@
-55,10
+55,20
@@
#define CAA_BITS_PER_LONG 32
#endif
#define CAA_BITS_PER_LONG 32
#endif
-#define caa_container_of(ptr, type, member) \
+/*
+ * caa_container_of - Get the address of an object containing a field.
+ *
+ * @ptr: pointer to the field.
+ * @type: type of the object.
+ * @member: name of the field within the object.
+ */
+#define caa_container_of(ptr, type, member) \
({ \
({ \
- const typeof(((type *)
NULL)->member) * __ptr = (ptr);
\
+ const typeof(((type *)
NULL)->member) * __ptr = (ptr);
\
(type *)((char *)__ptr - offsetof(type, member)); \
})
(type *)((char *)__ptr - offsetof(type, member)); \
})
+#define CAA_BUILD_BUG_ON_ZERO(cond) (sizeof(struct { int:-!!(cond); }))
+#define CAA_BUILD_BUG_ON(cond) ((void)BUILD_BUG_ON_ZERO(cond))
+
#endif /* _URCU_COMPILER_H */
#endif /* _URCU_COMPILER_H */
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